■ 직관적인 타원형 호를 그리는 방법을 보여준다.
▶ DrawingExtension.cs
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using System; using System.Collections.Generic; using System.Windows; using System.Windows.Controls; using System.Windows.Media; using System.Windows.Shapes; namespace TestProject { /// <summary> /// 그리기 확장 /// </summary> public static class DrawingExtension { //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Public #region 사각형 추가하기 - AddRectangle(canvas, fillBrush, strokeBrush, strokeThickness, left, top, width, height) /// <summary> /// 사각형 추가하기 /// </summary> /// <param name="canvas">캔버스</param> /// <param name="fillBrush">칠하기 브러시</param> /// <param name="strokeBrush">스트로크 브러시</param> /// <param name="strokeThickness">스트로크 두께</param> /// <param name="left">왼쪽</param> /// <param name="top">위쪽</param> /// <param name="width">너비</param> /// <param name="height">높이</param> /// <returns>사각형</returns> public static Rectangle AddRectangle ( this Canvas canvas, Brush fillBrush, Brush strokeBrush, double strokeThickness, double left, double top, double width, double height ) { Rectangle rectangle = new Rectangle(); Canvas.SetLeft(rectangle, left); Canvas.SetTop (rectangle, top ); rectangle.Width = width; rectangle.Height = height; rectangle.Stroke = strokeBrush; rectangle.StrokeThickness = strokeThickness; rectangle.Fill = fillBrush; canvas.Children.Add(rectangle); return rectangle; } #endregion #region 사각형 추가하기 - AddRectangle(canvas, fillBrush, strokeBrush, strokeThickness, rect) /// <summary> /// 사각형 추가하기 /// </summary> /// <param name="canvas">캔버스</param> /// <param name="fillBrush">칠하기 브러시</param> /// <param name="strokeBrush">스트로크 브러시</param> /// <param name="strokeThickness">스트로크 두께</param> /// <param name="rect">사각형</param> /// <returns>사각형</returns> public static Rectangle AddRectangle ( this Canvas canvas, Brush fillBrush, Brush strokeBrush, double strokeThickness, Rect rect ) { return canvas.AddRectangle ( fillBrush, strokeBrush, strokeThickness, rect.Left, rect.Top, rect.Width, rect.Height ); } #endregion #region 타원 추가하기 - AddEllipse(canvas, fillBrush, strokeBrush, strokeThickness, left, top, width, height) /// <summary> /// 타원 추가하기 /// </summary> /// <param name="canvas">캔버스</param> /// <param name="fillBrush">칠하기 브러시</param> /// <param name="strokeBrush">스트로크 브러시</param> /// <param name="strokeThickness">스트로크 두께</param> /// <param name="left">왼쪽</param> /// <param name="top">위쪽</param> /// <param name="width">너비</param> /// <param name="height">높이</param> /// <returns>타원</returns> public static Ellipse AddEllipse ( this Canvas canvas, Brush fillBrush, Brush strokeBrush, double strokeThickness, double left, double top, double width, double height ) { Ellipse ellipse = new Ellipse(); Canvas.SetLeft(ellipse, left); Canvas.SetTop (ellipse, top ); ellipse.Width = width; ellipse.Height = height; ellipse.Stroke = strokeBrush; ellipse.StrokeThickness = strokeThickness; ellipse.Fill = fillBrush; canvas.Children.Add(ellipse); return ellipse; } #endregion #region 타원 추가하기 - AddEllipse(canvas, fillBrush, strokeBrush, strokeThickness, rect) /// <summary> /// 타원 추가하기 /// </summary> /// <param name="canvas">캔버스</param> /// <param name="fillBrush">칠하기 브러시</param> /// <param name="strokeBrush">스트로크 브러시</param> /// <param name="strokeThickness">스토로크 두께</param> /// <param name="rect">사각형</param> /// <returns>타원</returns> public static Ellipse AddEllipse ( this Canvas canvas, Brush fillBrush, Brush strokeBrush, double strokeThickness, Rect rect ) { return canvas.AddEllipse ( fillBrush, strokeBrush, strokeThickness, rect.Left, rect.Top, rect.Width, rect.Height ); } #endregion #region 포인트 추가하기 - AddPoint(canvas, fillBrush, strokeBrush, strokeThickness, centerPoint, radius) /// <summary> /// 포인트 추가하기 /// </summary> /// <param name="canvas">캔버스</param> /// <param name="fillBrush">칠하기 브러시</param> /// <param name="strokeBrush">스트로크 브러시</param> /// <param name="strokeThickness">스트로크 두께</param> /// <param name="centerPoint">중심점</param> /// <param name="radius">반경</param> /// <returns>타원</returns> public static Ellipse AddPoint ( this Canvas canvas, Brush fillBrush, Brush strokeBrush, double strokeThickness, Point centerPoint, double radius ) { return canvas.AddEllipse ( fillBrush, strokeBrush, strokeThickness, centerPoint.X - radius, centerPoint.Y - radius, 2 * radius, 2 * radius ); } #endregion #region 호 추가하기 - AddArc(canvas, fillBrush, strokeBrush, strokeThickness, startPoint, endPoint, size, rotationAngle, isLargeArc, sweepDirection, isStroked) /// <summary> /// 호 추가하기 /// </summary> /// <param name="canvas">캔버스</param> /// <param name="fillBrush">칠하기 브러시</param> /// <param name="strokeBrush">스트로크 브러시</param> /// <param name="strokeThickness">스트로크 두께</param> /// <param name="startPoint">시작 포인트</param> /// <param name="endPoint">종료 포인트</param> /// <param name="size">크기</param> /// <param name="rotationAngle">회전 각도</param> /// <param name="isLargeArc">큰 아크 여부</param> /// <param name="sweepDirection">스윕 방향</param> /// <param name="isStroked">스트로크 여부</param> /// <returns>호 패스</returns> public static Path AddArc ( this Canvas canvas, Brush fillBrush, Brush strokeBrush, double strokeThickness, Point startPoint, Point endPoint, Size size, double rotationAngle, bool isLargeArc, SweepDirection sweepDirection, bool isStroked ) { #region 패스 지오메트리를 설정한다. PathGeometry pathGeometry = new PathGeometry(); #endregion #region 패스 세그먼트 컬렉션을 설정한다. PathSegmentCollection pathSegmentCollection = new PathSegmentCollection(); #endregion #region 아크 세그먼트를 설정한다. ArcSegment arcSegment = new ArcSegment ( endPoint, size, rotationAngle, isLargeArc, sweepDirection, isStroked ); pathSegmentCollection.Add(arcSegment); #endregion #region 패스 모양을 설정한다. PathFigure pathFigure = new PathFigure(); pathFigure.StartPoint = startPoint; pathFigure.Segments = pathSegmentCollection; pathGeometry.Figures.Add(pathFigure); #endregion #region 패스를 설정한다. Path path = new Path(); path.Stroke = strokeBrush; path.StrokeThickness = strokeThickness; path.Fill = fillBrush; path.Data = pathGeometry; canvas.Children.Add(path); #endregion return path; } #endregion #region 호 추가하기 - AddArc(canvas, fillBrush, strokeBrush, strokeThickness, rect, angle1, angle2, isLargeArc, sweepDirection, point1, point2) /// <summary> /// 호 추가하기 /// </summary> /// <param name="canvas">캔버스</param> /// <param name="fillBrush">칠하기 브러시</param> /// <param name="strokeBrush">스트로크 브러시</param> /// <param name="strokeThickness">스트로크 두께</param> /// <param name="rect">사각형</param> /// <param name="angle1">각도 1</param> /// <param name="angle2">각도 2</param> /// <param name="isLargeArc">큰 아크 여부</param> /// <param name="sweepDirection">스윕 방향</param> /// <param name="point1">포인트 1</param> /// <param name="point2">포인트 2</param> /// <returns>호 패스</returns> public static Path AddArc ( this Canvas canvas, Brush fillBrush, Brush strokeBrush, double strokeThickness, Rect rect, double angle1, double angle2, bool isLargeArc, SweepDirection sweepDirection, out Point point1, out Point point2 ) { Point[] pointArray = FindEllipsePointArray(rect, angle1, angle2); point1 = pointArray[0]; point2 = pointArray[1]; Size size = new Size(rect.Width / 2, rect.Height / 2); return canvas.AddArc ( fillBrush, strokeBrush, strokeThickness, pointArray[0], pointArray[1], size, 0, isLargeArc, sweepDirection, true ); } #endregion //////////////////////////////////////////////////////////////////////////////// Private #region 타원 세그먼트 교차점 배열 찾기 - FindEllipseSegmentIntersectionPointArray(rect, point1, point2, segmentOnly) /// <summary> /// 타원 세그먼트 교차점 배열 찾기 /// </summary> /// <param name="rect">사각형</param> /// <param name="point1">포인트 1</param> /// <param name="point2">포인트 2</param> /// <param name="segmentOnly">세그먼트 전용 여부</param> /// <returns>타원 세그먼트 교차점 배열</returns> private static Point[] FindEllipseSegmentIntersectionPointArray(Rect rect, Point point1, Point point2, bool segmentOnly) { if((rect.Width == 0) || (rect.Height == 0) || ((point1.X == point2.X) && (point1.Y == point2.Y))) { return new Point[] { }; } if(rect.Width < 0) { rect.X = rect.Right; rect.Width = -rect.Width; } if(rect.Height < 0) { rect.Y = rect.Bottom; rect.Height = -rect.Height; } double centerX = rect.Left + rect.Width / 2f; double centerY = rect.Top + rect.Height / 2f; rect.X -= centerX; rect.Y -= centerY; point1.X -= centerX; point1.Y -= centerY; point2.X -= centerX; point2.Y -= centerY; double a = rect.Width / 2; double b = rect.Height / 2; double A = (point2.X - point1.X) * (point2.X - point1.X) / a / a + (point2.Y - point1.Y) * (point2.Y - point1.Y) / b / b; double B = 2 * point1.X * (point2.X - point1.X) / a / a + 2 * point1.Y * (point2.Y - point1.Y) / b / b; double C = point1.X * point1.X / a / a + point1.Y * point1.Y / b / b - 1; List<double> valueList = new List<double>(); double discriminant = B * B - 4 * A * C; if(discriminant == 0) { valueList.Add(-B / 2 / A); } else if(discriminant > 0) { valueList.Add((double)((-B + Math.Sqrt(discriminant)) / 2 / A)); valueList.Add((double)((-B - Math.Sqrt(discriminant)) / 2 / A)); } List<Point> pointList = new List<Point>(); foreach(double value in valueList) { if(!segmentOnly || ((value >= 0f) && (value <= 1f))) { double x = point1.X + (point2.X - point1.X) * value + centerX; double y = point1.Y + (point2.Y - point1.Y) * value + centerY; pointList.Add(new Point(x, y)); } } return pointList.ToArray(); } #endregion #region 타원 포인트 배열 찾기 - FindEllipsePointArray(rect, angle1, angle2) /// <summary> /// 타원 포인트 배열 찾기 /// </summary> /// <param name="rect">사각형</param> /// <param name="angle1">각도 1</param> /// <param name="angle2">각도 2</param> /// <returns>타원 포인트 배열</returns> private static Point[] FindEllipsePointArray(Rect rect, double angle1, double angle2) { Point centerPoint = new Point ( rect.X + rect.Width / 2.0, rect.Y + rect.Height / 2.0 ); double distance = rect.Width + rect.Height; Point point1 = new Point ( centerPoint.X + distance * Math.Cos(angle1), centerPoint.Y + distance * Math.Sin(angle1) ); Point point2 = new Point ( centerPoint.X + distance * Math.Cos(angle2), centerPoint.Y + distance * Math.Sin(angle2) ); Point[] intersectionPointArray1 = FindEllipseSegmentIntersectionPointArray(rect, centerPoint, point1, true); Point[] intersectionPointArray2 = FindEllipseSegmentIntersectionPointArray(rect, centerPoint, point2, true); return new Point[] { intersectionPointArray1[0], intersectionPointArray2[0] }; } #endregion } } |
▶ MainWindow.xaml
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<Window x:Class="TestProject.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Width="800" Height="600" Title="직관적인 타원형 호 그리기" FontFamily="나눔고딕코딩" FontSize="16"> <Grid> <Canvas Name="canvas" /> </Grid> </Window> |
▶ MainWindow.xaml.cs
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using System; using System.Windows; using System.Windows.Media; using System.Windows.Shapes; namespace TestProject { /// <summary> /// 메인 윈도우 /// </summary> public partial class MainWindow : Window { //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainWindow() /// <summary> /// 생성자 /// </summary> public MainWindow() { InitializeComponent(); Loaded += Window_Loaded; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private #region 윈도우 로드시 처리하기 - Window_Loaded(sender, e) /// <summary> /// 윈도우 로드시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Window_Loaded(object sender, RoutedEventArgs e) { Rect rect = new Rect(200, 100, 360, 280); this.canvas.AddEllipse(null, Brushes.Yellow, 10, rect); Rectangle rectangle = this.canvas.AddRectangle(null, Brushes.Green, 2, rect); rectangle.StrokeDashArray = new DoubleCollection(new double[] { 5, 5 }); Point point1; Point point2; this.canvas.AddArc ( null, Brushes.Red, 2, rect, 0.25 * Math.PI, Math.PI, true, SweepDirection.Counterclockwise, out point1, out point2 ); this.canvas.AddArc ( null, Brushes.Blue, 2, rect, 0.25 * Math.PI, Math.PI, false, SweepDirection.Clockwise, out point1, out point2 ); Path path1 = this.canvas.AddArc ( null, Brushes.Red, 2, rect, 0.25 * Math.PI, Math.PI, false, SweepDirection.Counterclockwise, out point1, out point2 ); path1.StrokeDashArray = new DoubleCollection(new double[] { 5, 5 }); Path path2 = this.canvas.AddArc ( null, Brushes.Blue, 2, rect, 0.25 * Math.PI, Math.PI, true, SweepDirection.Clockwise, out point1, out point2 ); path2.StrokeDashArray = new DoubleCollection(new double[] { 5, 5 }); this.canvas.AddPoint(Brushes.White, Brushes.Black, 1, point1, 6); this.canvas.AddPoint(Brushes.White, Brushes.Black, 1, point2, 6); } #endregion } } |
